胶结料浆梁拼板中不同弱面的抗剪性能试验研究

结合金川矿区深井开采复杂条件,选取典型区域进行现场取样。选择RYL-600微机控制岩石剪切流变仪,通过施加不同的正压力(围压)对4组梁拼板进行抗剪试验。试验结果表明:在抗剪联接条件下,高浓度砂浆梁拼板与分级尾砂膏体梁拼板的抗剪强度,都明显大于非抗剪联接条件下对应料浆梁拼板的抗剪强度。无抗剪联接条件下,分级尾砂膏体梁拼板试件的抗剪强度,大于高浓度砂浆梁拼板试件的抗剪强度。在抗剪联接条件下,2种料浆梁拼板试件的抗剪强度基本接近。研究表明在相邻充填进路间增加抗剪联接结构,可以改善进路充填体弱面之间的抗剪性能,进而提高充填体的整体稳定性。

Research on Shear Resistant Performance of Different Weak Plane in Cemented Slurry Beam Butt Welding

Combining the complex condition of Jinchuan Mine,on-site sampling in typical regional is made. The shearing experiments on four groups of structural slabs under different normal pressure were carried out by RYL-600 computer-controlled shear rheology machine. The experiments showed that the shear strength of cemented high-density tailing mortar and the graded tailing paste mortar under shear resistant connection is higher than that of without shear resistant connection. Without shear resistant connection in slabs,the shear strength of the graded tailing paste mortar is more than that of high-density tailing mortar. As installing shear resistant connection in slabs,the shear strength of the graded tailing paste mortar was close to that of the high-density tailing mortar. The experimental result showed that the shear strength of both mortars separately rose just as the shear resistant connection was installed between two close week places of back-filling bodies,and then the whole stability of filling structure was enhanced.